Paper-making machine.



C. V. BARRETT.

PAPER MAKING MACHINE.

APPL'IOATIOKTILBD JULY 24,1911.

Patented June 2, 191% ITN ESSES %%4 INVENTOR BYMKJW ATTORNEYS cmr'ron v. BARRETT, or LITTLE 'r'ALLs, NEW YORK.

PAPER-MAKING MACHINE.

Specification of Letters Patent.

Patented June 2, 1914.

Application filed July 24, 1911. Serial No. 640,206.

To all whom it may concern Be it known that I, CLIFTON V. Bnnnn'rr, of Little Falls, in the county of Herkimer and State of New York, have invented certain new and useful Improvements in Paper-Making Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the aft to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the reference-numerals marked thereon, which form part of this spec1fication.

My invention relates to papermaking machines and its purpose is to provide an improved device for more effectively transferring the web of paper from the press rolls to the first drier.

Heretofore, especially with thin paper, difliculties have arisen in successfully taking the web of paper from the last press roll to the first drier. In the ordinary papermaking machine the web of paper is passed through the last pair of press rolls on the surface of a wet felt carrier from which it is separated immediately after passmg between the press rolls by adhering to the press roll with which it has come in contact and from which it is taken by means of its own tensile strength and led to the first drier. On account of the weakness of the web of paper at thisstage of its manufacture, the web is often broken or torn by reason of its adhering at somepoint to the last press roll more tightly than usual. This happens especially with thin paper when a piece of pulp of greater thickness than usual or a particle of dust, dirt or other foreign substance gets into the paper and is pressed against the press roll. I overcome these difiiculties and add to the efficiency of the machine by providing a movable felt pressed by a yiel dingly tensioned roller against the web of paper upon the press roll. To this felt the paper adheres, leaving the press roll, and is carried on said felt toward the first drier and from which felt the paper is easily separated by its own strength.

. The drawing is a side elevation of part of a paper-making machine embodying my in vention.

1 and 2 represent the upper and lower press rolls respectively, or the last pair of ress rolls if more than one pair are used, between which the web of paper 3 is carried on its progress from the paper forming end of the machine (not shown) by a supporting or carrying felt 4. After passing between these press rolls the carrying felt 4 is led downwardly over idler rolls 5 and 6 and then back to the paper forming end of the machine. In passing between the press rolls 1 and 2'upon'the, surface of the carrying felt 1, the web of paper 3 has been pressed with great pressure directly against. the face of the upper press roll 1 to which the paper adheres and is carried upwardly thereon to a point 7 preferably a little above the axis of this press roll 1. At this point 7 the side of the web of paper away from the press roll 1 comes in contact with a movable felt 8 which is mounted upon and pressed against the paper by a spring pressed roll 9 journaled in bearings 10 slidingly located on a frame 11 which is pivotally and adjustably supported in position as by having its other end suitably secured to the drier frame 12. This endless felt is supported on carrier rolls 13 and 1 1 journaled in bearings 15 and 16 respectively, provided upon the frame 11 and passes over a take-up and guide roller 17 also journaled in suitable bearings 18 upon the frame 11. In addition to the weight of the frame 11 and its supported rolls, yielding tension means such as springs 19 and adjusting screws 20 acting thereupon, are provided for keeping the roll 9 at all times close enough to the upper press roll 1 as to press the transfer felt 9 with sufiicient pressure upon the web of paper 3 on the press roll 1 to effect the transfer of said web to the felt 8 and also to transmit motion to said felt equal to the motion of the press roll 1 andthe web of paper 3 thereon. Upon coming into such pressure contact with the felt 8 at oint 7 the web of paper 3 leaves the upper press roll 1 and adheres to the transfer felt .8 upon which it is carried part way toward the first drier 21 and then easily led by its own tensile strength from the transfer paper.

A part of the pressure for the contact of roll 9 with the aper 3 upon the roll 1 may be obtained by avin the frame 11 pivotally mounted upon the drier frame 12 so that a large portion of the weight of the frame 11 and the rolls 9, 13 and 14 will be carried at the contact point of the roll 9 with the roll 1. By reason of this, weight coming upon the roll 1 at the point indicated, it exerts a very powerful pressure but one that ma yield when needed. The spring 19 a ds further resiliency to the pressure.

hat I claim as new and desire to secure by Letters Patent is:

1. In a paper-making machine the combination with a final press roll carrying directly on its surface a web of paper, of a movable transfer felt brought into contact with said web of paper and means for so movably holding said felt in such contact.

2. In a paper-making machine the combination with a final press roll carrying directly on its surface a web of paper, of a movable transfer felt brought into contact with said web of paper and moved by such contact and means for so movably holding said felt in such contact.

3. In combination with the paper-carrying press roll of a paper-making machine, a

" the web. of paper on said movable transfer felt held in contact with ress roll and yieldingly tensioned means f dr so movably holding said felt in such contact.

l. In a paper-making machine a device for transferring to the first drier a web of paper carried directly on the final press roll consisting of an endless felt coming in contact with the web on said ress roll and moving therefrom toward sai drier, a roll directly holdin said felt in contact with the web on said press roll and other supporting rolls for said felt.

5. In a paper-making machine a device for transferring the web of paper from the paper-carrying press roll to the first drier consisting of an endless felt coming in contact with the paper on said press roll and moving therefrom toward said drier, ayieldingly tensioned roll directly holdin said felt in contact with the paper on sai I press roll and other supporting rolls for said felt.

In witness whereof I have affixed my signature, in the presence of two witnesses, this 18 day of July 1911.

CLIFTON V. BARRETT.

Witnesses:

SARAH E. CLARK, WOODWARD W. GUILE. 

